Ecology of the free-living stages of nematode parasites of sheep.
D000818:Animals; D004463:Ecology; D012621:Seasons; D012756:Sheep; D012757:Sheep Diseases / Q000517:prevention & control*; D014251:Trichostrongyloidea; D014252:Trichostrongyloidiasis / Q000517:prevention & control / Q000662:veterinary*